The tag alias #54652 sexyinflationgirl_(artist) -> boman100 has been approved.

Reason: Same artist.

Their DA Bio (at https://www.deviantart.com/boman100 ) says:
"Feel free to support me through any of the websites below and commission me anything! ...
Furaffinity: https://www.furaffinity.net/user/sexyinflationgirl/
Pillowsoft: https://www.pillowfort.social/Cassidy
Patreon: https://www.patreon.com/Cassidy100 "

https://www.furaffinity.net/user/sexyinflationgirl/ says "My Name is Cassidy ..."
with no external links on their userpage.
(EDIT: some uploads in their FurAffinity link to deviantart.com/boman100 )
(latest FA blog about their dog passing away. Post condolences to their blog?)

Their Patreon (https://www.patreon.com/Cassidy100 ) says "Cass is creating Sexy Art" AND
their Patreon banner image says "Boman100" and "B100Comics".

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Both tags currently artist tags:
1) 34 posts tagged with boman100
2) 1 post tagged with sexyinflationgirl_(artist)

(avoiding plain sexyinflationgirl tag seems like good idea. I can imagine someone tagging image of inflatable female with tag sexyinflationgirl)

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Recent art in BOTH FA sexyinflationgirl and DeviantArt boman100:
1) Sandy BIG Cheeks - Remastered
https://www.furaffinity.net/view/43040723/ (FA rating: General)
https://www.deviantart.com/boman100/art/Sandy-BIG-Cheeks-Remastered-887432634

2) Brandy Harringtons Swollen Butt
https://www.furaffinity.net/view/42698372/ (FA rating: MATURE)
https://www.deviantart.com/boman100/art/Brandy-Harringtons-Swollen-Butt-885140563

3) Happy 4th of July - Shima Edition
https://www.furaffinity.net/view/42629481/ (FA rating: MATURE)
https://www.deviantart.com/boman100/art/Happy-4th-of-July-Shima-Edition-884623303

(three examples is probably enough)

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Artist name on recent art is "Boman100".
(before then artist sig on art was "B100")

(I found no uploads with "sexyinflationgirl" written on artwork)

(THIS section a summary of BELOW)

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5 latest uploads in sexyinflationgirl FA main gallery have Boman100 artist name on them.

• latest: https://www.furaffinity.net/view/43040723/ (posted July 31, 2021) with description "A remastered pic of" (and with incomplete link to a https://www.deviantart.com/boman100/ URL.
• earliest of the 5: https://www.furaffinity.net/view/39961260/ (posted Jan 3, 2021)

The image before Jan 3 upload has "B100" on it and is post announcing "no more paid commissions...".

Earlier uploads in that gallery are a mix of
1) have artist sig "B100" on them (earliest might be https://www.furaffinity.net/view/25309029/ (rated ADULT) which was posted 4 years ago, on Nov 1, 2017)
2) https://www.furaffinity.net/view/24600681/ has "Boman100" on it.
3) no artist name on art (sometimes by other artists)

DeviantArt has similar pattern of names on art. (ie. Recent art with "boman100" on them, older with "B100" on them, and oldest with NO name on them)

EDIT: The tag alias sexyinflationgirl_(artist) -> boman100 (forum #318022) has been approved by @Rainbow_Dash.